US257948A - Electric - Google Patents

Description

(N0 Modl.)

R, M. HUNTER.

ELECTRIC 8IGNAL. I N0. 257,948. Patented May 16, 1882,

N. Pz'mm Pfiqmum n har, Washington D. c

general, but more particularly to signals for tele- I D STATES PATENT A OFFICE.

RUDOLPHlVIQHUNTEEOF PHILADELPHIA, PENNSYLVANIA",

ELECTRICESIGNAL.

SPECIFICATION. forming, part of Letters rate No. 257,948, dated May re, 1882. Application filed Octoher ls, 1881. (No model.)

To alt whom it may concern: y Be it known that I, RUDOLPH M. HUNTER, of the city and county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Electric Signals, of which the following is a specification.

My invention relates to electricsignals in phonic purposes; and it consists in a contactwheel having a single contact-point in its cireumference, combined with an eleeti-o-magnet adapted to rotate said contact-wheel step by step, and a device to complete a localcircuitthrough the contact-point on said contact: wheel, saidlocal circuitbeingeircuited through the signal hell or alarm further, in an elec-- tro magnet or magnetsadaptedto rotate. a contact circle orfwheel step by step, and at the ending of each of said. movementscompleting a local circuit through a coil or helix to mag-' netize a core, sa-id core being arranged to attract an armature or retarding device adapted to close asecond contact and complete a local circuit throughthe electric bell; further, ina

contact-lever combined with aretardingdevice adapted to descend slowly but raise quickly further, in combining two helices and two armaturesrwith three circuits, one of which is circuitedthrough the main line or an auxiliary relay, another of which is circuited through the localbatteryand one armature, and the remaining onebeing circuited through the local battery, electric bell, and theot-her armature and,finally, in many detailsof construction, all of which are fully set forth in the following specification and shown in the accompanying drawings, which form part thereof.

The object of this invention is to provide a signalin g device at each station on a telephoneline to enable the operator to signal any station desired. The object is, further, to dispense with a central station and to enable signaling to be carried on over a single wire over which an electric current of uniform strength is passing, and thereby dispense with variable battery-power.

1n the drawings, Figure l is a perspective view of myimproved electric signaling device. Fig. 2 is a section of one form of double electr o-magnet, and Fig. 3 is a side elevation ofa modified form of my improved device. .A is the bed-plate, upon which is secured ,the line-wire.

the upright post B, carrying the supportingpiece (J, which is secured in place by the nut D. This pieceO supports and ca'rriesthe'electro-magnet coils E and. F, in the center of which is located the iron core Gr. Part of the ,wire'ofcoil E may extend up around the upper partofthe core G, as shown at E in Fig.

2, and, ifdesired, the core maybe made in two "parts, insulated from each other, so that the ,lowerpart might be magnetized withoutchang I 'ing the upper part; but- I prefer' the former construction, as shown in Fig. 2. The ends of ibobbin or helix E'are connected with the bind .ing posts S S whichreccive thetwo ends of One end of bobbin or helix F :is connected to binding-post S, which receives local-circuit wire, f, connected with one pole of local battery Z. y y M Pivoted to the post B at his the armature H, the end of which is provided with a spring finger, H, adapted to mesh with a ratchet- "wheel, 0, secured to and insulated from a shaft, N, carrying the contact-wheel M, furnished with a single contact, m,connectingthe speriphery with the shaft N. The armature H may be adjusted by the thumb-screw h and,

spring h and is provided with a contact, I, *preferablymade of a spring. An ordinary adjusting-spring may be used, if desired, to withdraw the armature H quickly away from the magnet E; but itis not absolutely required in the construction shown in Fig. 1, as gravity performs that function. I

The piece 0 carries the insulating-bushing K over the contact-spring I on armature H,

said bushing carrying a metallic nut, L, through which the contactserew J passes, and inwhich itis adjusted. The nut or metallic bushing L is connected to the other end of the bobbin or helix F. If desired, the piece 0 may be made of insulating material and the bushings dispensed with. The other pole of battery Z is connected through binding-post S with the armature H, thereby completiu g the local circuit through the helix F.

The shaft N is pivoted between setscrews- R Q Q, carried by frame P. A spring-tooth, R, presses against the ratchet-wheel O, to prevent its moving unless positively rotated by the armature H. A pointer, 19, secured to the frame P, indicates the signaling-point. One pole of battery Z is connected with one bind- IOO ing-post on the electric bell Y, the other binding-post being connected with the frame 1? and contact at through the binding-post S The other pole of battery Z is connected with 5 the armature-lever T, pivoted to the post B at t through post B. The lever T is provided with contact adjustable screw T at a point above the center of the contact-wheel M. The end of the lever T is secured to a rod, U, carrying a plunger or piston, V, on its lower end, which works in a glass or metallic cylinder, W, provided with the enlarged diameter 10. The rod U is guided through the cap or cover X, and is serew threaded and furnished with an adjustable nut, U, between which and the cap is a spring, V, which tends to keep the lever up and free of the contact-wheel M. The spring may be arranged in any other desirable manner, if desired. The cylinder W contains glycerine or other liquid; or mercury may be used, in which latter case an iron piston, V,

' would be used, and in all cases this piston almost fits the cylinder atits smallest diameter,

but is much smaller than the large part of the cylinder.

If desired, the wire connecting the upper part of post B with battery Z may be dispensed with, as its function would be per formed by wire secured to binding-post S.

This device would work without the use of the upper helix, F, but not so positively or in a such a satisfactory manner.

' The operation is as follows: The operator at one station works his key until the number on contact circle or wheel M indicating the station he is desirous of signaling is in front of the pointer 11. Now, if he works his key quickly, the leverT could not descend to complete the local circuit through the alarm,as .0 the magnet operating said lever would not have received its full power until at the end of each stroke of the key, when thearmature H completes the local circuit through said -magnet, and time would be required before 4 5 the piston V could descend in the small part of cylinder W, and force the liquid above it. Every oscillation or movement of the armature H closes the local circuit through the magnet I, Upon opening the key or breaking contact the spring V forces the lever quickly hack to its original position, as the enlarge- ,rnent w in the cylinder offers no resistance to the upward movement of the piston V, and as the piston entersthe enlarged diameter the liquid quickly runs under the piston into the small diameter. Therefore by this device there is. considerable resistance to the downward movement of the piston, but none to its upward movement. Now, if the operator keeps 6o hislkey closed, the local circuit through the coil. F will have been completed and will have time to pull the lever T down, operating the alarm or. signal bell, as it then has time to overcome the resistance offered by the piston and small cylinder. The time and power required to operate this retarding device may be regulated by the adjustment of the spring circuited helix to complete a local circuit through the alarm-bell, two local circuits, and

V and piston andby the diameter of the small and large parts of the cylinder W.

Having now described my invention, what I 7 claim as new, and desire to secure by Letters Patent, is-

1. In an electric call or signal, an electromagnetic core and means to ma gnetize and demagnetize it with the line-circuit, in combination with two armatures arranged one at each end or pole of said core, one of which armatures is provided with rotating devices and the other with circuit-closing devices, and a contact-wheel having a conducting-point on its periphery, one of said armatures operating to intermittently rotate said contact-wheel an the other of said armatures operating to-close a local circuit through said contact-wheel.

2. In an electric call or signal, two electric coils or helices, means to actuate or electrify one of them by the line-circuit and the other by a local circuit, in combination with an alarm-bell, a local battery, two local circuits, a contact-wheel, an armature actuated by one of saidv helices to intermittently rotate said contact-wheel and complete at every stroke one of the local circuits through the other helix, and an armature operated by said helix in the local circuit to close the other local circuit through the alarm-bell.

3. In an electric signal, two electric coils or helices, means in the line-circuit to control the passage of electricity through one of said helices, a contact-wheel, and an armature to rotate said contact-wheel, and provided with means to close a local circuit through the other of said helices at every stroke, in combination with a second armature actuated by the locala retarding device to preventthe latter of said armatures descending too rapidly to close the alarm-circuit.

4. In an electric signal, the combination of no two electric coils or helices, a line-circuit through one of said coils and a local circuit through the other of said coils, and mechanism arranged to complete the local circuit through one coil upon acurrent being passed through the other coil, with mechanism, substantially as described, to complete a single local alarmcircuit, said mechanism being operated and controlled by both of said helices jointly, substantially as and for the purpose specified.

5. In an electric signal, two helices, two armatures, a contact-wheel, an alarm, and three circuits, one of which is the main-line and is circuited through one of said helices, the second alocal circuit through the other helix, and the third a local circuit through the alarm, in combination with mechanism to close both the first and second of said circuits at every stroke of the key or closing of the line-circuit, and means to close the third of said circuits through the alarm upon holding said first and second circuits closed.

6. In an electric signal, the combination of core G, helix EE, of two diameters, armature H, with its spring-finger H, contact-wheel M, and armature T, independent of armature H, provided with contact-screw T, substantially as'and for the purpose specified.

7. In an electric signal, the combination of core Gr, helix E E, armature H, with'its springfinger H, contact-wheel M, armature T, provided with contact-screw T, and a retarding device to prevent the armature T(said core Gr being the common attraction 'for both of said armatures H and T) from falling quickly.

8. A retarding device for electric signals, which consists of a cylinder having the small diameter W and large diameter to, in combi- 'nation with a piston or plunger, V, adapted to vertical movement, a spring, V, or its equivalent, to hold said piston above or at the top of said small diameter of the cylinder, an armatare-lever attached to said plunger and provided with acontact to complete a local circuit which is independent of the electro-magnet which actuates said armature, and an electromagnet to actuate said armature-lever and and a contact-screw, J, said armature operating to complete a local circuit through helix F, substantially as and for the purpose specified.

10. In an electric signal, the combination of helices E and F, core G, common to both of said helices, armature H, provided with springfinger H, means, substantially as described, to complete a circuit through helix F every time a current is passed through helix E, contactwheel M, armature T, provided with contactscrew T and contact-screw J, in circuit with helix F, substantially as and for the purpose specified. V

11. In an electric signal, a retarding device which consists of a vessel having two diameters, the smaller being at the bottom, and a plunger or piston which before action is above the small diameter and in the large diameter, so as to leave a clear passage-way for the liquid from above the piston to below the same after it has been fully raised, in combination with an alarm-circuit, a contact to close said alarm-circuit and controlled by said plunger and its operating electro-magnet, and an electro-magnet to actuate said plunger and force it down into the small diameter, substantially as set forth.

' In testimony ofwhich' invention I hereunto set my hand.

RUDOLPH M. HUNTER.

Witnesses:

J OHN W. STEWARD, R. A. GAVIN.

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